In simple terms, the quote suggests that difficulty acts as a nurturing force that helps individuals grow stronger and more capable over time. Much like how a stern parent might push their child to develop physically through challenging exercises, hardship can propel people towards greatness by pushing them out of their comfort zones.
The deeper meaning of this statement delves into the idea that true strength and resilience come from overcoming obstacles rather than avoiding them. By facing challenges head-on, individuals are compelled to adapt and learn in ways they might not if everything came easily to them. This process can be rough and uncomfortable at times but ultimately leads to personal development and growth. The metaphor of a "harsh nurse" who "roughly rocks her foster-children into strength" highlights the idea that while tough experiences may initially seem harsh or unpleasant, they are instrumental in shaping someone's character and abilities.
William Cullen Bryant was an influential American author and poet active during the 19th century. He is best known for his poetry about nature and his role as a journalist and editor. His works often explored themes of human resilience and the beauty found in both natural landscapes and personal struggles, making him a fitting voice to express such profound thoughts on perseverance and strength through adversity.